The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 285
rty, in the order inwhich the call was received. When the trunk line is free (orthe call matures ) the operator connects to it, and instructsthe distant operator to connect the desired number. She thenimmediately speaks to the local exchange, and instructs thejunction operator to connect the… … Fig. 267 cases where an order wire is not used the record lines maybe worked on one of the ordinary junction methods similarto that shown in Fig 264, the signalling and clearing beingautomatic. In other cases the record lines are signalled bykey, etc., as below. Ringing Record Circuit.—Fig 267…
Telephone
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